Pressed-sheet-metal radiator.



G. E. SAPFORD.

PRESSED SHEET METAL RADIATOR. APPLICATION FILED NOV. 25, 1912.

1, 1 1 5,742. Y Patented Nov. 3, 1914.

WITNESSES [NI/EN TOR TH NORRIS PETERS 60.. FHOTO'LITh WASHINGYUN. D. C.

CLARENCE E. sArronn, or nnrnorr, MICHIGAN.

PRESSED-SHEE'l -METAL RADIATOR.

. Specification of Letters Patent.

Application filed November 25, 1912. Serial No. 733,269.

To all whom it may concern:

Be t known that I, CLARENCE E. SAFFORD,

a citizen of the United States, and a resident of Detroit, in the county of Wayne and State of Michigan, have invented a new and Improved Pressed-Sheet-Metal Radiator, of

which the following is a specification.

structed of pressed sheet metal halves, and particularly to themeans for securing the halves together to form sections, and its object is to provide simple and effective connecting means. for these purposes so that the radiators may be employed in what is termed vacuum systems of heating.

This invention consists, in combination with pressed sheet metal halves of radiator sections, of novel means for securing the edges of the halves of the sections together.

Figure 1 is a horizontal section of a radiator at substantially one-half its height. Fig. 2 is a horizontal section of the same through the connecting devices between adjacent sections. Fig. 3 is a cross section of the joint between the edges of two halves of a radiator section on a larger scale.

Similar reference characters refer to like parts throughout the several views.

This radiator is formed with sections, each composed of two halves pressed out from properly cut blanks, which sections are given the shape shown in cross section in Figs. 1 and 2. These sectionshave edges 3 which contact along the line 4: as shown in Fig. 3 and then are curved or turned out wardly, in which position they are securely held by a circumferential clamp 5 whose cross-section is rolled in the form shown in dotted lines in Fig. 8, with a central ridge 6 and exterior ribs 7 After the sections are formed, the clamping bar is cut to proper length, bent to conform to the shape of the section and then welded if desired. The endless clamping bar so formed is preferably heated and thereby expanded, after which it may be slipped over the edges of the halves of the corresponding section and allowed to cool and contract into tight engagement with the section. When in position these clamps are rolled or pressed down, as shown in solid lines in Fig. 3, which causes the ribs 7 to engage with the half-sections just within the outwardly curved or turned edges 3. The central ridge 6 prevents these edges from moving toward each other and the ribs 7 prevent the clamping bar from slipping off these edges. The-re sult is a positive, fluid-tight joint of great strength and permanency. These half sectlons are also formed with longitudinal corrugations Swhich may be formed with proections 9 at intervals as shown in Fig. 1, at

v f which points these half sections may be con- This lnvention relates to radiators connected together, preferably by electrically welding. Near the top and, bottom, each half section. is formed with an inwardlyexten'ding cylindrical flange 10. Before the halves of the sections are assembled, a ring 11, having apertures 13 of any desired size and number, is placed in position to surround the cylindrical fiange 10. After the halves have been united to form a section, this ring 11 forms a permanent part of the section and prevents the flanges and the annular portions 14 from moving toward each other.

To properly position the sections to form a radiator, small nipples 15 of any desired material, steel preferred, are inserted in the flanges 10 of one section, whereupon the adj acent section is placed upon it, as shown in Fig. 2. The rush of water back and forth between the sections has a strong erosive action on these nipples and it is therefore desirable to reinforce them by means of a ring 17 of copper or a similar non-erosive material. A bolt 18 extends through the sections which are united and is provided with a nut 19 at its end, and preferably with a washer 20bearing against the closure 21. This closure is provided with an annular portion 22 Patented Nov. 3, 1914.

which rests against the annular portion 14 of the outer half of the end section. When the nut 19 is screwed down hard so that ab tight joints are insured. A small cap 24:

may be employed to cover this depression in which the nut 19 is seated. This radiator will then have vertical chambers 25 and 26 which will be connected at the top and bottom by transverse chambers 27. It will be understood, however, that the controlling means for the heating medium may be modified as desired and that the proportions of all the parts of this radiator may all be changed without departing from the spirit of my invention as set forth in the claims.

I claim.

1. A radiator section formed of sheet metalhalves and means to unite the halves together, the edges of the halves contacting with each other along their inner surfaces and then turning outwardly, and an endless clamping bar extending around the section, said bar consisting of a body portion and a ridge formed integral therewith along its inner surface and wedging between the halves of the section to hold the outwardly turned portions of the edges apart, and a pair of exterior ribs each being in close engagement with the outwardly turned portion of the edge of the corresponding half along the inner surface of the curve to hold the edges together.

2; A radiator comprising a plurality of sections formed of sheet metal halves and means to unite the sections, the edges of the halves of each section contacting and then turning outwardly and curving from each other so as to form a trough-shaped groove between said edges, and a clamping bar extending around each section and having a ridge formed integrally'therewith and fitting in said groove, and having a rib along each edge adapted to fit between the body and edge of a half-section when said bar is forced down to grip the edges of said section.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

CLARENCE E. SAFFORD.

Witnesses:

EDWARD N. PAeELsEN, HUGO W. KREINBRING.

Copies of this patent may be obtained for five cents each, by addressing the Gommissioner'uf Patents,

' Washington, D. G. 

